Johnson Controls PENN P470 User Manual

P470 Electronic Pressure Control with Display Product/Technical Bulletin 1
Refer to the QuickLIT Web site for the most up-to-date version of this document.
The P470 Electronic Pressure Control with Display is a
single-stage, On/Off, electronic pressure control with a
Single-Pole, Double-Throw (SPDT) output relay. The
control may be field set to operate in one of
three pressure ranges (0 to 100 psi, 0 to 500 psi, or
50 to 750 psi), as either an open-high or open-low
control.
The P470 control features a large LCD that displays
the sensed pressure and other system-status
indicators, as well as the adjustable setpoints in the
programming mode. The P470 control has a lockable,
three-button touchpad for adjusting setpoints, and a
front-panel LED that indicates the output relay status.
The P470 control uses a P499 Electronic Pressure
Transducer in conjunction with a WHA-PDK3 Wiring
Harness to sense system pressure. This arrangement
virtually eliminates the chance of a refrigerant leak
because there are no capillaries or bellows to break or
fail.
Figure 1: P470 Pressure Control with Transducer
and Wiring Harness (Control, transducer, and
harness must be purchased separately.)
Table 1: Features and Benefits
Features Benefits
Easy to Read Liquid Crystal Display (LCD) Clearly displays the sensed pressure (and other control information),
and in many situations pressure may be monitored without applying
gauges to the controlled equipment
Three Field-Selectable Pressure Ranges
between 0–750 psi
Provides the flexibility to cover most HVACR pressure applications with
three field-selectable pressure ranges; 0–100 psi with 5 psi minimum
differential, and 0–500 psi or 50–750 psi with 20 psi minimum
differential
24 VAC, and 120 or 208/240 VAC Models Increases application options, with two controls that cover most
common voltages
Lockable, 3-Button, Front-Panel Touchpad Deters tampering and over adjustment of control settings by
unauthorized personnel
Built-in, Adjustable, Anti-Short Cycle
Time-Delay
Reduces compressor short cycling and nuisance lockouts, which can
extend compressor life
Uses an Economical and Versatile Transducer
and Wiring Harness
Eliminates many of the constraints of capillary control applications and
allows up to a 100 ft (30.5 m) cable between control and transducer
P470 Electronic Pressure Control with Display
Product/Technical Bulletin
Code No. LIT-125528
Part No. 24-7664-2004, Rev. A
Issued January 26, 2012
Supersedes November 1, 2000

Johnson Controls PENN P470 Specifications

General

Brand	Johnson Controls
Model	PENN P470
Category	Control Unit
Language	English

Summary

Application and Operation

Application Options

Describes the P470 control's use for On/Off control in refrigeration and HVAC loads based on system pressure.

Operation Overview

Explains how the P470 uses a transducer to sense pressure and activate the output relay based on setpoints.

Dimensions and Display

Liquid Crystal Display (LCD)

Details the information displayed on the LCD, including pressure, setpoints, and status indicators during operation.

P470 Pressure Control Settings

Introduces adjustable setpoints (cut-in, cutout) and how to change them via the touchpad.

Control Configuration

Anti-Short Cycle Delay

Explains the function and programming of the anti-short cycle delay feature to prevent compressor short cycling.

Jumpers, Mounting, and Wiring

Covers jumper settings, mounting options for the enclosure, and general wiring guidelines.

Wiring Diagrams

Typical Wiring for 120 VAC

Illustrates the wiring diagram for 120 VAC applications of the P470EB-1 Pressure Control.

Typical Wiring for 208/240VAC

Illustrates the wiring diagram for 208/240 VAC applications of the P470EB-1 Pressure Control.

Typical Wiring for 24 VAC

Illustrates the wiring diagram for 24 VAC applications of the P470FB-1 Pressure Control.

Adjustments and Jumper Settings

Positioning the Jumpers

Provides detailed instructions on positioning jumpers for touchpad lock and establishing the operating pressure range.

Setpoint and Delay Adjustment

Changing Setpoint Values

Step-by-step guide on how to change control setpoint values and anti-short cycle delay time-interval.

Troubleshooting Procedures

Equipment Needed

Lists the tools and equipment required for troubleshooting the P470 control and transducer.

Check Supply Voltage

Detailed steps to check the supply voltage to the control and the pressure transducer.

Transducer Signal Verification

Check Transducer Output Signal

Procedures to measure and verify the transducer's output signal voltage against pressure readings.

Control Operation Verification

LED Status for Open-High Controls

Explains how the front-panel LED indicates status for open-high control operation based on setpoints.

LED Status for Open-Low Controls

Explains how the front-panel LED indicates status for open-low control operation based on setpoints.

Ordering and Specifications

Ordering Information

Lists product codes for P470 controls, P499 transducers, and wiring harnesses.

Technical Specifications

Details operating pressure ranges, accuracy, voltage, ambient temperature, and enclosure.